Experimental research on emission and removal of dioxins in flue gas from a co-combustion of MSW and coal incinerator [An article from: Waste Management]

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Description:
This paper describes the experimental study of dioxins removal from flue gas from a co-combustion municipal solid waste and coal incinerator by means of a fluidized absorption tower and a fabric filter. A test rig has been set up. The flow rate of flue gas of the test rig is 150-2000m^3/h. The system was composed of a humidification and cooling system, an absorption tower, a demister, a slurry make-up tank, a desilter, a fabric filter and a measurement system. The total height of the absorption tower was 6.5m, and the diameter of the reactor pool was 1.2m. When the absorbent was 1% limestone slurry, the recirculation ratio was 3, the jet rate was 5-15m/s and the submerged depth of the bubbling pipe under the slurry was 0.14m, the removal efficiency for dioxins was 99.35%. The concentration of dioxins in the treated flue gas was 0.1573x10^-^1^3kg/Nm^3 and the concentration of oxygen was 11%. This concentration is comparable to the emission standards of other developed countries.